Improvement in lifting-jacks



l caps X.

tte-aa sere @tutti dimite.

r. `o. WHITE, or EUoLID,l oHIo.

Letters" Patent No. 100,828, dated March 15, 1870:

IMPROVEMENT IN LIFTINGJACKS.

The Schedule referred to in these Letters Patent and making part o1 me same To all whom 'it may concern.-

Be it known that I, F. O. WHITE, of Euclid, in the 4 county of Cuyahoga, and State of Ohio, have inventeda certain new and improved Farm-Fence Jack; and I do hereby declare that the following is a full, clear, and complete description of the same, reference heilig had to the accompanying drawings making part of this Like letters of reference refer to like parts in the several views. Objective. l

This invention has for its object the lifting of fences bymeans of a jack, `said jack being constructed with a roller actuated by a pawl and lever, and around whichiis wound a rope or chain having its free end attached to the fence, which is thereby lifted from `the ground for placing thereunder a stone, or for the insertion of a rail, as hereinafter more fully described.

' i l p cscrptire. In lig. 1'- l l A represents a standard provided with abroad base y or foot-piece, B.

In an aperture cut through the upper endof said standard is inserted a roller, O, haviiigs its bearings in the sides thereof, and secured in place by. the

On one -eud or side of said roller is cut a series of teeth, a, forming a ratchet-wheel, indicated `by the dotted lines E, tig. 3, whereby the roller is actuated by the `application of thev lever F and hook pawl G, thereto attached loosely at the p'oint b, as hereinafter shown. f l l 0n the opposite side of` the roller is also cut a series of teeth, c, fig. 1, forming a.1'atcl|et-w-heel, H,

i which also maybe indicated by the dotted lilies E,

gThertwo ratchet-wheels possess the same construcf tive character, andhold each a side relation to the roller.

I is a pau'l, p' 4'ot-ed to the standard at the point c, the lower end of which falls upon the ratchet-wheel H, and is forced in engagement ther ewitlr by a spring, J, actuating a shorter arm of the pawl.

K is a rope or chain, one end of which is attached to the roller, whereas tothe other is attached a hook, L, fig. 3.

Operative. n Having thus described the construction and ar- .rangement of the jack, the operation ofthe same is as follows, viz:

, The jack when used for lifting a 'fence is placed in close position thereto. The hook is then4 inserted under the rails near the ground, or, if a part only of the fence is to be lifted fol-,the in'-placing of a new rail, then under any railof the number necessary.

- The position of the jack to the felice, when thus adjusted thereto, is shown in fig. 3.

1t will be obvious that on raising and depressing the lever I? the pawl will engage the teeth of the ratchet-wheel E, and on its downward movement will turn the roller and thereby wind up the rope K, at the same time lifting the fence by means of the hook, the pawl I preventing the reaction of the roller during the upwardmoveinent of thelever, or holding it at any particular height;

By this means the fence.can be easily and quickly lifted from the ground, or any part thereof, so that foundation-stones may be placed under it.or new rails i inserted, as the case may-be, saving by this means much time and labor, as one person only is required to operate it.

It will be obvious that this jack may be usefully employed in raising heavy pieces of timber or other bodies requiring much power for their lifting, and also as a wagon-jack by using, in connection therewith, the auxiliary standard M, a detached view ot which is shown in 4. By placing this standard upon thehook, and in relation thereto as shown in tig. 3, and thus securing it by the pin d projected through the standard into the hook, the upper end of the auxiliary standard is adjusted under the axlet-ree, which is thereby raised by the pawl and lever, as above described.-

The pawl G is disengaged from the ratchet-wheel to allow of the unwiuding of the rope by depressing the lower `end down upon the level', thereby throwing up the opposite end out of the teeth, and which may be easily done by the same hand operating the lever.

Claim..

What I claim as my invention, and desire to secure v by Letters Patent, is-

The roller C, ratchet-wheels H E, pawls I and G, lever F, rope K, and hook L, with or without the auxiliary standard M, in vcombination with the standard A, and arranged to operate in the manner substantially'as described, and for the purpose set forth.

` F. (l. WHITE.Y

Witnesses W. H. BURRIDGE, D. G. BIGELOW. 

